Patent US3638447A successfully refreshed from Google Patents.
US3638447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator with capillary control means
Assignee: Hitachi Ltd
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Filing: 1969-08-19
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Granted: 1972-02-01
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Expires: 1989-08-19
Abstract
Abstract A refrigerator having a refrigerating vessel divided into a plurality of compartments comprising either cold storage compartments or at least one cold storage compartment and one freezing compartment each of which is provided with an evaporator for the refrigeration thereof. Capillary tubes are provided for supplying the refrigerant to the individual evaporators in the compartments, and heating coils are wound around portions of the capillary tubes. An electric current is caused to flow through the heating coils in order to provide individual control of the supply of the quantity of refrigerant.
Inventors
- 👤 Yoritsune Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:17
CPC Classifications
F; F25; F25B; F25B5/00; F25B41/00; F25B41/30; F25B41/37; F25B2400/00; F25B2400/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
A refrigerator comprising, a refrigerating vessel divided into a cold storage compartment and a freezing compartment, each including at least one evaporator for gasifying refrigerant passed therethrough and thus for refrigerating the corresponding compartment, respectively; a compressor for compressing the refrigerant from said individual evaporators; a condenser for liquefying the compressed refrigerant by said compressor; refrigerant supplying means including first and second capillary tubes for providing the refrigerant from said condenser to each of said evaporators in such a manner that the refrigerant that has passed through the first capillary tube is then introduced into the evaporator of said cold storage compartment then into said evaporator of said freezing compartment and brought back to said compressor, while the refrigerant passed through said second capillary tube is recycled to said compressor through said evaporator of said freezing compartment; heating means including heating coils wound around the respective capillary tubes for heating said capillary tubes; and control means for controlling supply of electric current to said heating coils, whereby different temperatures are provided to said compartments.
Claim 2
Dependent Claim
174 words
A refrigerator comprising, a refrigerating vessel divided into a cold storage compartment and a freezing compartment, each including at least one evaporator for gasifying refrigerant passed therethrough and thus for refrigerating the corresponding compartment, respectively; a compressor for compressing the refrigerant from said individual evaporators; a condenser for liquefying the compressed refrigerant by said compressor; refrigerant supplying means including first and second capillary tubes for providing the refrigerant from said condenser to each of said evaporators in such a manner that the refrigerant that has passed through the first capillary tube is then introduced into the evaporator of said cold storage compartment then into said evaporator of said freezing compartment and brought back to said compressor, while the refrigerant passed through said second capillary tube is recycled to said compressor through said evaporator of said freezing compartment; heating means including heating coils wound around the respective capillary tubes for heating said capillary tubes; and control means for controlling supply of electric current to said heating coils, whereby different temperatures are provided to said compartments.
Claim 3
Dependent Claim
60 words
A refrigerator according to claim 1, wherein said cold storage compartment is provided with a defrosting means which, during normal operations, heats a portion of said second capillary tube to limit the flow rate therethrough and, for defrostIng, restricts the flow rate of the refrigerant through said first capillary tube and, at the same time, heats said cold storage compartment.
References Cited (Backward Citations)
US2106591A
Cited
US2241086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |